Expansion shield



2 Sheets-Sheet l Z2 Il R. E. OGDEN EXPANSION SHIELD Filed May 3, 1923,94 am K4 z5 z/ April 1, 1930.

ATTORNEY April 1, 1930 R. E. OGDEN 1,752,752

Y EXPANSION SHIELD Filed May', 1923 2 Sheets-Sheet 2 /6 fg/Ji M 362m"INVENTOR A TTORNE Y l Passed Appr. 1, 193e UNITED STATES PMENT OFFICERAIPE OGDEN,-OF MOUNTAINVILLE, NEW YORK, ASSIGNOR, BY MESNE ASSIGN-MENTS, TO J'. EDWARD OGDEN COEPANY, OF NEW YORK, N. Y., A. CORPORATIONl' NEW JERSEY EXPANSION SHIELD Application led May. 8, 1923. Serial No.636,390.

This invention relates to improvements in bolt anchors of the characteremployed for obtaining anchorage in walls of brick, stone andcementitious material not adapted to directly receive a threaded member.

One of the objects of the invention is to vprovide an expansion shieldso const ruc.ted and 'arranged as to possess superior grippingqualities.`

Another object of the invention is to provide a shield and an expandingmember for the shield so relatively constructed and arranged as toobtain gripping actions at a plurality of different points or areascthroughout the length of the shield.

Another object of the invention is to provide an expansion shieldadapted to be used with and expanded by a driven expandlng member.

Another object of the invention is to provide an expansion shieldcomprising t wo exactly similar sections thereby rendering the sectionsinterchangeable and reducingto a minimum the cost of manufacturing.

Another object of the invention is to provide an expansion shieldparticularly adapted for use with'a cable clamp.

Another object of the invention is to provide an expansion shield, a'cableclamp and a bridle ring so relatively constructed and arrangedthat the ring has a shank for expanding the shield and.also has meansfor retaining the cable in position.

Further objects of the invention will appear from the followingspecification taken in connection with the drawings, which form apart ofthis application, and in which Fig. 1 is an elevational View of one formof expansion shield constructed in accordance with the invention.

Fig. 2 is an elevational view taken at right Y an les to Fig. 1.

Fig.y 6, but showing longer tabs than those shown in Figs. 1 to'6.

Fig. 8 is a sectional elevation of the construction shown in Figs. 1 and2, but illustrating the shield in position in a wall opening andsecuring an object to the wall and showing one form of expanding elementadapted for use in connection therewith.

Fig. 9 is a sectional elevation similar to Fig. 8, but showing a screwas the expanding element.

Fig. lO is an elevational view similar to F ig. 1, but showing widertabs than those shbwn in Figs. 1 and 2.

Figs. 11 and 12 are sectional elevations taken respectively onlines'11-11 and 12-12 of Fig. 10.

Fig. 13 is a sectional elevation of another form of shield constructedin accordance with the invention in which an encircling band is used inthe place of the tabs shown in the preceding figures.

Fig. 14 is a transverse sectional elevation taken substantially on line141-14 of Fig. 13.

Fig. 15 is anelevational view illustrating another form of shieldconstructed in accordance with the' invention in which the metal at theedges of the shield sections is folded l invention, illustrating theIshield as corru- 4 gated.

Fig. 18 is a transverse sectional elevation taken substantially online18-18 of Fig. 17. Fig. 19 is an elevational 'view showing the shieldmounted in a w'allopening and securing thereto a cable clamp and bridlering.

Fig. 2O is an elevational view showing another form of bridle lringhaving the expanding elementformed integral therewith, and Fig. 21illustrates' still another form of bridley ring adapted for use inconnection with the shield'f` n The invention briey described consistsin an expansion shield particularly adapted-for use with a drivenexpanding element. The shield is substantially cylindrical imshape andcomprises a pair of exactly similar sections, each sec'tion havingformed therein depressed portions adapted to receive means for securingthe `sections together. In certain embodiments of the invention, eachsection is provided with tabs adapted to engage the other section and inother embodiments of the invention, the sections are secured together bya band engaging both sections. The and and tabs form excess metal andthe depressions form internal projections or embossments adapted to beengaged by the expanding element.

The shield also has formed on its outer end a laterally extending angeand in use the shield is adapted to pass through the opening in anobject to be secured and the iiange is adapted to seat against theobject. The shield is particularly adapted for' use with a headedexpandin element, such as a nail or screw and these e ements may bedriven into the shield. The head of the expanding element serves toreinforce the flange on the shield. One use of the invention is shown inFig. 19, wherein a bridle ring and cable clamp are secured to awall,.but other applications or uses of the invention will be obvious tothose skilled in the art. When used with a bridlefrin or cable clamp,these elements may be secure by 'any desired form of expanding element yor, as shown in Figs. 20 and 21, the bridle ring may be formed with ashank adapted to enter and expand the shield. Further details of theinvention will appear from the following description.

In the particular embodiment of the invention illustrated in Figs. 1 to-7 inclusive, the shield comprises a pair of sections 20 and 21, eachsection have a iiange 22 at its outer end, these flanges forming asingle ianged end for the shield when the sections. are securedtogether.

The two sections of the shield are exactly alike and each section has apair of longitudinally spaced tabs 23 formed at'one of its c dges and asingle tab 24 formed at the opposite edge and disposed intermediate thepair of tabs. The edge of the section having the siigle tab has formedat each side of said tab a epression 25 disposed in alinement with thetabs of the pair at the opposite edges. The edge of the section havinthe air of tabs has formed therein interme 'ate t 's pair and alinementwithf-the single tab on the opposite edge a de ressibn 26. Thesedepressions forin inward y extending protuberances or einbossments andare engaged by the expanding element 'when this element is forced intothe shield. l When the sections are secured together. as lllustrated inthe drawings, the tabs of each sectionoverlap the other-section and seatin the depressionsformedtherein. These depressions in conjunctionwithjthe tabs form an excess of metal which is 'expandedinto firm,gripping engagement with the inner surface of the wallropening.

The depressions25 and 26 form shoulders at the ends thereof forconfining the excess metal of the tabs and insure the radial expansionof the tabs by the expanding element.

Furthermore, the tabs are retained against possible shearing or relativelongitudinal movement with reference to the shield. When the shield isexpanded the interlocking of the tabs or excess metal inthe depressionsand. engagement of the tabs in the wall opening securely retains theshield against withdrawal.

In the embodiment of the invention shown in Fig. 8, an object 30 has anopening 31 therein of substantially the same diameter as the outerdiameter of the shield. The' shield is, therefore, passed through thisopening and positioned in the wall opening and thereafter an expandingelement such as a nail 32 is driven into the shield expanding it intofirm, gripping engagement with the wall opening. The nail preferably has'a tapered end 33 and a head 34. The head 34 serves to reinforce theflange 22 of the shield thereby aiding and retaining the object 30 inposition.

The shield may, however, be used in conjunction with a screw 36 such asillustrated in Fig. 9 and this screw may be driven in or screwed intothe shield.

The sectional view in Fig. 7 differs from the showings in the precedingfigures in that the tabs 37 are longer than the tabs 23 and 24 and itshould be understood that these tabs may be made in any desired form orshape.

In Figs. 10, 11 and 12, the tabs 39 and 40 are formed wider than thoseshown in the preceding figures. Y

In the embodiment of the invention illustrated in Figs. 13 and 14, theshield sections 20 and 21 are formed with longitudinal depressions 41and the sections are secured together by means of an elongated splitband 42. The depressions 41 form shoulders in the shield at the endsthereof. These shoulders serve to confine the sleeve or split band 42and to prevent relative longitudinal movement between the band andshield when the sleeve is inserted or driven into the opening and toprevent withdrawal of the shield after by the depressed portions 41.When the shield and band are expanded by the member 32 or 36 the innershoulder prevents the band from being forced longitudinally inwardlyalon the shield as the intermediate shoulder is bent by the action ofthe expandingl member. In Figs. 15' and 16 the shield sections 20 and 21are .depressed throughout the major portion of the lengthand the metalat the edges of the sections at the depressed portions thereof is foldedback on the outer surface of the shield as shown at 43. Each sectionadjacent the outer end thereof is provided with a depression 44 and atab 45, the tab of one section seating in the depression of the othersection.

In Figs. 17 and 1s the Shield is provided this flange has an opening 55for receiving the shank of the securing and expanding element 32. Whenthe parts are assembled as shown in Fig. 19, the shield is first passedthrough the opening in the cable clamp ange 51 and the bridle ring isthen positioned with its ange 54 abutting the flange 22 of the shield.The expanding and securing element 32 is theninserted through theopening 55 and the flange 54 of the bridle ring and into the shield.This element will then expand the shield into a firm' and grippingengagementwith the wall openin In Fig. 20.y a bridle ring 56 isillustrate this ring having a flange 57 and a shank 58 This form ofbridle ring may be used without any other expanding or securing element.A

In Fig. 21 the bridle ring 59 has formed thereon an annular flange 60and an integral shank 61.

From the foregoing specification, it will be seen that a very simple andpractical expansion shield construction has been designed and that theshield is well adapted to perform the desired functions and accomplishthe objects set forth. It will also be noted that this shield isespecially7 adapted for use with cable clamps and bridle rings.

Although certain specific embodiments of the invention have beenparticularly shown and described, it will be understood that theinvention is capable of modification and that changes in theconstruction and in the arrangement of the various cooperating parts maybe made without departing from the spirit or scope of the invention, asexpressed I in the following claims.

What I claimis:

1. In combination, an expansion shield comprising a pair of sheet metalsections, each section having tabs thereon overlapping and engaging theother section and having inwardly extending embossrnents on the innersurface thereof formed by depressions in the shield, said depressionsreceiving'said tabs, and an ex airdmg element adapted to be driven intot e, shield from the outer end thereof and having a diameter as great asthe maximum inner diameter of the shield, said expanding element beingadapted to engage the embossments and force outwardly the embossmentsand tabs.

2. In combination, an expansion shield comprising-a pair of sheet metalsections, each section having tabs thereon ,overlapping and engaging theother section and having oppositely disposed depressions forminginwardly extending embossments on the inner surface thereof, the tabsbeing seated in the depressions, and an expanding element adapted to bedriven into. the shield from the outer end thereof and having a diametersubstantially y as great as the maximum inner diameter of the shield,said expanding element being adapted to engage the embossments and forceoutwardly t-he embossments and tabs.

3. In combination, an expansion shield comprising a pair of sections`formed of sheet metal, each section having a plurality of tabs and aplurality of depressions extending into the bore of the shield,`saidtabs and depressions being so relatively arranged that the tabs of eachsection engage the depressions in the other section, and an expandingele-` ment adapted to be driven into the shield from the outer endthereof and to engage the inwardly extending depressions and force saiddepressions and tabs outwardly.

4. In combination, a substantially cylindrical expansion shieldcomprising a pair of sections, each section having tabs thereonoverlapping and engaging the other section and havin portions thereofdepressed forming inwardly extending embossments on the inner surfacethereof, said depressions receiving said tabs, and an expanding elementadapted to be driven into the shield from the outer end thereof andtoengage said embossments and force the embossments and tabs outwardly.

5. A substantially cylindrical expansion shield comprising a pair ofsections,'means for securing the sections together, said means includingdepressionsforming inwardly extending embossments, decreasing theinternal diameter of the shield and excess metal ldisposed in saiddepressions, and a driven expanding member ada ted to engage theembossments and force t e embossments and excess metal outwardly.

6. In combination, a substantially cylindri-` cal expansion shieldcomprising a pair of sec-l tions, said sections bemg depressed to form aplurality of pairs of inwardly extending oppositely disposedembossmentson the inner surface thereof, excess metal on the outersurface ofthe shield disposed in the depressions and ,holding saidsections together, and an expanding member'adapted to be driven into theshield from the outer end thereof and to engage 4the embossments andforce the shield sections outwardly. c 7. In combination, an expansionshield of hard metal having its bore constricted at an intermediateportion of its length and a thin divided flange of non-expansible metalintegral with the shield about one end thereof and' substantially atright angles to the shield axis, and an expanding element adapted toengage and expand the constricted ortion and having a head adapted toover` ap ,and reinforce said flange.

8. In combination, an expansion shield having depressed portionsconstricting the bore and having a ange at one end thereof, excess metalon the outer surface of the shield disposed in the de ressed portionsand an expanding element having a head adapted to coact with the flan-geto reinforce said iiange.

9. In combination, an open ended expan sion shield having a depressedortion constricting the bore and having a ange at one end thereof, metaldisposed on the outer surface of the shield and disposed in the deressed portion and an expanding element having a head adapted to coactwith the flange to reinforce said flange.

10. An expansion shield comprising a sheet metal, substantiallycylindrical open ended tubular member having a Hange at one end extendinlaterally beyond the outercylindrical sur ace of the shield and havingdepressions formed in and extending into the bore of the member therebydecreasing the internal diameter thereof and metal on the outer surfaceof the shield disposed in said depressions.

11. An expansion shield' comprising a sheet metal tubular member havinga iange at the outer end thereof extending laterally beyond the outercylindrical surface of the shield, said shield having a longitudinalparting therein, said member being depressed at one side of the partingand having a tab bridging the parting and disposed in the depression,the depression constricting the bore of the shield. l

12. In combination, an expansion shield formed of sheet metal and havinga flange at the outer end thereof and having a depression thereinconstricting the bore of the shield and forming shoulders at the ends ofthe de ression and metal on the outei surface o the shield and disposedbetween said shoulders and' in the depression, and an expandin elementadapted to be driven into the s ield from the outer end thereof andVhaving a diameter substantially as great as the maximum inner diameterof the shield.

In Witness whereof, I have hereunto set my hand this 1st day of May,1923. v

RALPH E. OGDEN.

